Anti-Siphon Valve, 3/8" Barb, 1/4 NPT - Moeller
Anti-Siphon Valve, 3/8" Barb, 1/4 NPT - Moeller
Price: $12.11
Save: $3.18
(20% Off $15.29)
Part # 033801-10
2nd Day Air for $2.99 More Eligible
SHIPS TOMORROW!* if ordered in 16 hrs 58 mins.
Anti-Siphon Valve, 3/8" Barb, 3/8 NPT - Moeller
Anti-Siphon Valve, 3/8" Barb, 3/8 NPT - Moeller
Price: $15.09
Save: $5.00
(24% Off $20.09)
Part # 033802-10
2nd Day Air for $2.99 More Eligible
SHIPS TOMORROW!* if ordered in 16 hrs 58 mins.
VALVE-ANTISIPHON AL 1/4X1/4NPT - Moeller
VALVE-ANTISIPHON AL 1/4X1/4NPT - Moeller
Price: $11.56
Save: $3.13
(21% Off $14.69)
Part # 3380510
2nd Day Air for $2.99 More Eligible
SHIPS TOMORROW!* if ordered in 14 hrs 58 mins.
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VALVE-ANTISIPHON BR 3/8X1/4NPT - Moeller
VALVE-ANTISIPHON BR 3/8X1/4NPT - Moeller
Price: $12.59
Save: $3.40
(21% Off $15.99)
Part # 3380710
2nd Day Air for $2.99 More Eligible
SHIPS TOMORROW!* if ordered in 14 hrs 58 mins.
VALVE-ANTISIPHON BR 3/8X3/8NPT - Moeller
Price: $13.98
Save: $3.81
(21% Off $17.79)
Part # 3380810
2nd Day Air for $2.99 More Eligible
SHIPS TOMORROW!* if ordered in 14 hrs 58 mins.
VALVE-ANTISIPHON BR 1/4X1/4NPT - Moeller
VALVE-ANTISIPHON BR 1/4X1/4NPT - Moeller
Price: $12.02
Save: $3.27
(21% Off $15.29)
Part # 3380610
2nd Day Air for $2.99 More Eligible
SHIPS TOMORROW!* if ordered in 14 hrs 58 mins.
No Reviews
Moeller

The Moeller Anti-siphon Valve prevents the back flow of fuel into the boat’s bilge in case of fuel overflow or damage in the fuel line. This valve is constructed of high-quality aluminum to withstand rugged use. And, it features a hose barb design that prevents leaks and ensures optimum performance even in pressurized fuel systems.

  • Prevents backflow of fuel into the bilge
  • Aluminum construction
  • Hose barb design

This anti-siphon valve is an ideal for use on all gasoline-powered boats.

Features of Moeller Aluminum Anti-Siphon Valve

  • Prevents backflow of fuel into the bilge
  • Aluminum construction
  • Hose barb design
  • Ideal for gasoline-powered boats
  • Optional fuel demand valve

Specifications For Part # 033802-10

  • Size: 3/8 NPT

Specifications For Part # 033801-10

  • Size: 1/4 NPT
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Anti-Siphon Valve
by Billy from Gadsden, Alabama on September 07, 2015
Exact replacement. Installed and working. Old valve had frozen up after 13 years of service.
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works as required
by Alan from Poolesville, Maryland on October 08, 2014
Works as required. Fast shipping
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Anti-siphon valve
by John from Sidney, Ohio on September 15, 2013
Worked great - solved my problem of hard start for my I/O. It used to take 20-30 seconds of engine cranking before the engine started but now it starts in 1 second. Fuel restriction and leak back was the apparent problem with the old valve. The new valve has a larger flow passage for the same outside dimensions. Je42
(1 of 1 people found this review helpful)
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It's an anti-siphon valve...
by Jim from Tolono, Illinois on September 15, 2013
And it's the only one iboats has, so if you need one....buy it. It works. It's aluminum, I would have preferred brass, but I like iBoats, so I got it. Remember..this valve keeps you bilge from filling with fuel if a hose cracks or leaks.....so you need to have one.
(1 of 1 people found this review helpful)
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Perfect
by Steven from Fredericksburg, Virginia on August 19, 2013
Exactly what I needed, arrived very quickly. If I ever need any more boat parts. I know where to come.
(1 of 1 people found this review helpful)
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Siphon valve
by John from Wilmington, North Carolina on June 04, 2012
Very Quick ship and works great
(3 of 4 people found this review helpful)
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Problem solved
by Roy from Morehead City, North Carolina on October 06, 2014
I purchased this product to solve a problem in a fuel system manifold. I have a two tank system with twin engines and a generator. I can run the entire system on one tank now because I was able to resolve the siphon problem. I
(1 of 1 people found this review helpful)
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valve
by Michael from Farmington, New Mexico on July 21, 2013
performs well
(2 of 2 people found this review helpful)
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Anti-Siphon Valve, 3/8" Barb, 1/4" NPT -Moeller
by Michael from Fairport, New York on July 01, 2013
Good product and fast service. Will order again from iboats.
(2 of 2 people found this review helpful)
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Average Customer Review for VALVE-ANTISIPHON BR 3/8X1/4NPT - Moeller
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This valve is Calibrated 30
by John from Punta Gorda, Florida on July 30, 2016
I was looking for an ASV for my 260HP engine, which means it should be a "calibration 15". Reading the description for this part, it seems that this brass valve would be a Cal 15, for "greater than 200 HP". Turns out it's a Cal 30, as marked on the part packaging, and stamped on the part itself. After calls to customer service Moeller, looks like if you want a cal 15 in 1/4"NPT and 3/8" barb, you need to get it direct from the factory in aluminum, their part number A000030. Also available from iboats, Moeller says 033808-10 is a Cal 15, but my pick-up tubes wouldn't accept the 3/8"NPT on that part. Customer service was awesome to work with. So I am going to rate this a 3 only to alert those who want a 1/4" NPT Cal 15 that this is not it.Thanks
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A must have item for safety on board your boat.
by Raymond from Chicago, Illinois on September 07, 2015
My review on the anti siphon valve is this, what is the difference between the aluminum and the brass valve? I know that the valve is a must have item for fuel safety but what is the difference between the two valves.
(0 of 1 people found this review helpful)
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Average Customer Review for VALVE-ANTISIPHON BR 3/8X3/8NPT - Moeller
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Does not stop reverse flow
by Rodney from Issaquah, Washington on November 06, 2013
Last summer my fuel $200 pump failed. My mechanic said this was likely caused by the pump having to reprime too often (draw fuel back into the pump at the start of each day) because the anti-siphon valve was allowing the fuel to drain out of the pump, back into the tank each night. I confirmed the 20 year old part in my boat would allow some air flow backwards when blowing back on the fuel line (you can hear bubbling in the tank). So, I ordered this NEW Moller valve. The part I received leaked far worse then my 20 year old part. Air would flow freely in the reverse direction. Looking at the new valve, I could see dents in the check ball surface and very rough machining on the seat. Of course it leaked! I contacted Moller, who gave me a response that it meets the Coast Guard requirements for an anti-siphon valve, is not required to prevent reverse leakage. Basically, they say it is OK that the sealing surfaces looked like garbage. I returned the part. My complements to iboats.com for the relatively simple return process. In short, do not buy this part if you are expecting it to prevent reverse fuel leakage out of your fuel pump. It is junk that appears made in China.
(2 of 2 people found this review helpful)
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Q:
I have a 1989 Johnson GT150 outboard. Will this work wih carbrated engine.?
A:
Yes.


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